TY - CONF TI - Strategic risk management through lean construction–enhanced mitigation: the Sitinjau Lauik flyover project, Indonesia C1 - Singapore, Singapore C3 - Proceedings of the 34th Annual Conference of the International Group for Lean Construction (IGLC 34) SP - 1631 EP - 1641 PY - 2026 DO - 10.24928/2026/0197 AU - Alfrianto, Rifki AU - Pramono, Fitriana Prahastiwi AU - Naufal, Achmad Luthfi AU - Widyastuti, Amy Rachmadhani AU - Rahman, Arif AU - Wresniwira, Sastria AU - Soekharjo, Gunadi AU - Hermawan, Iwan AU - Wiranata, Halim AD - Vice President, Corporate Secretary Division, PT Hutama Karya (Persero), Jakarta, Indonesia, rifki.alfrianto@hutamakarya.com, orcid.org/0009-0000-5278-6138 AD - Operation, Infrastructure I Division, PT Hutama Karya (Persero), Jakarta, Indonesia, fitriana.prahastiwi@hutamakarya.com, orcid.org/0009-0008-0504-5749 AD - Lean Coordinator, Engineering, Research & IT Division, PT Hutama Karya (Persero), Jakarta, Indonesia, achmad.luthfi@hutamakarya.com, orcid.org/0009-0002-3464-7673 AD - Executive Vice President, Engineering, Research & IT Division, PT Hutama Karya (Persero), Jakarta, Indonesia, amy.rachmadhani@hutamakarya.com, orcid.org/0009-0006-7600-6064 AD - Executive Vice President, Infrastructure I Division, PT Hutama Karya (Persero), Jakarta, Indonesia, arif.rahman@hutamakarya.com AD - Analyst, Engineering, Research & IT Division, PT Hutama Karya (Persero), Jakarta, Indonesia, sastria.wresniwira@hutamakarya.com, orcid.org/0009-0007-5137-7253 AD - Directors, Operational I, PT Hutama Karya (Persero), Jakarta, Indonesia, gunadi@hutamakarya.com AD - Directors, Operational III, PT Hutama Karya (Persero), Jakarta, Indonesia, iwan.hermawan@hutamakarya.com AD - Vice President, Engineering, Research & IT Division, PT Hutama Karya (Persero), Jakarta, Indonesia, halim.wiranata@hutamakarya.com ED - Hamzeh, Farook ED - Poshdar, Mani ED - Garcia-Lopez,, Nelly P. AB - The Sitinjau Lauik Flyover Project is a strategic infrastructure initiative in West Sumatra designed to address severe geometric constraints and safety risks along a critical logistics corridor. Delivered under a Design–Build–Finance–Operate–Maintain–Transfer (DBFOM) Public–Private Partnership (PPP) scheme with an investment value of IDR 2.793 trillion (approximately USD 175 million), the project operates within a complex planning environment characterized by geotechnical instability, environmental constraints, and an aggressive construction timeline. These conditions require robust risk mitigation planning at an early project stage. This study adopts a scenario-based comparative approach to examine how Lean Construction can enhance risk mitigation planning compared to conventional practices. Using a project risk register as the primary data source, inherent and residual risk profiles are compared under two mitigation scenarios: conventional mitigation and Lean Construction–enhanced mitigation. Residual risk values are assessed through scenario-based estimation to support comparative analysis rather than predict actual performance outcomes. The results indicate that Lean Construction enhances mitigation robustness by reducing risk probability and exposure through improved planning reliability, early alignment, and constraint management. The findings suggest that Lean Construction can function as a planning-level risk mitigation enhancer, complementing conventional controls in complex infrastructure PPP projects. KW - Risk management KW - lean construction KW - PPP KW - infrastructure project KW - risk mitigation. PB - T2 - Proceedings of the 34th Annual Conference of the International Group for Lean Construction (IGLC 34) DA - 2026/06/22 CY - Singapore, Singapore L1 - http://iglc.net/Papers/Details/2501/pdf L2 - http://iglc.net/Papers/Details/2501 N1 - Export Date: 19 June 2026 DB - IGLC.net DP - IGLC LA - English ER -